Comment: The Marconi Lifeguard is a maritime auto alarm receiver designed to automatically monitor distress frequencies for alarm calls from ships in distress. Up on receipt of an alarm, the unit will sound an alert in the radio room, the radio officer's quarters and on the bridge so that all necessary crew members are alerted to the distress.
Frequency: Monitors 500 KHz
Modes: Reacts to CW or MCW signals
Technology: Vacuum tube.
Mains input: 110 VDC or 220 VDC with the use of a dropping resistor/ ; can be run from AC mains with the use of an adaptor unit,
Made by: Marconi Marine
Comment: Succeeded by the Lifeguard N series.
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| Lifeguard Auto Alarm receiver. (Photo courtesy Internal Fire Museum) | |
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| Internal view of the auto alarm. One valve and a bank of relays are missing from the main circuit board. (Photo courtesy Internal Fire Museum) | |
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| This version of the Lifeguard autoalarm. may have been built under licence since the front panel does mot bear the usual Marconi Marine logo. (Image courtesy Marconi Mariner magazine). |
Contributors and Credits:
1) Internal Fire Museum https://marconillifeguard.blogspot.com/
2) Ross Bradshaw [ross.bradshaw@mypostoffice.co.uk]
Mar 31/20